1 files changed, 41 insertions, 0 deletions
diff --git a/source-builder/sb/markdown/extensions/smart_strong.py b/source-builder/sb/markdown/extensions/smart_strong.py
new file mode 100644
index 0000000..58570bb
--- /dev/null
+++ b/source-builder/sb/markdown/extensions/smart_strong.py
@@ -0,0 +1,41 @@
+'''
+Smart_Strong Extension for Python-Markdown
+==========================================
+
+This extention adds smarter handling of double underscores within words.
+
+See <https://pythonhosted.org/Markdown/extensions/smart_strong.html>
+for documentation.
+
+Original code Copyright 2011 [Waylan Limberg](http://achinghead.com)
+
+All changes Copyright 2011-2014 The Python Markdown Project
+
+License: [BSD](http://www.opensource.org/licenses/bsd-license.php)
+
+'''
+
+from __future__ import absolute_import
+from __future__ import unicode_literals
+from . import Extension
+from ..inlinepatterns import SimpleTagPattern
+
+SMART_STRONG_RE = r'(?<!\w)(_{2})(?!_)(.+?)(?<!_)\2(?!\w)'
+STRONG_RE = r'(\*{2})(.+?)\2'
+
+
+class SmartEmphasisExtension(Extension):
+    """ Add smart_emphasis extension to Markdown class."""
+
+    def extendMarkdown(self, md, md_globals):
+        """ Modify inline patterns. """
+        md.inlinePatterns['strong'] = SimpleTagPattern(STRONG_RE, 'strong')
+        md.inlinePatterns.add(
+            'strong2',
+            SimpleTagPattern(SMART_STRONG_RE, 'strong'),
+            '>emphasis2'
+        )
+
+
+def makeExtension(*args, **kwargs):
+    return SmartEmphasisExtension(*args, **kwargs)